var base64js = (function () {
  return function r(e, t, n) {
    function o(i, a) {
      if (!t[i]) {
        if (!e[i]) {
          var u = typeof require == "function" && require;
          if (!a && u) return u(i, !0);
          if (f) return f(i, !0);
          var d = new Error("Cannot find module '" + i + "'");
          throw d.code = "MODULE_NOT_FOUND", d;
        }
        var c = t[i] = {
          exports: {}
        };
        e[i][0].call(c.exports, function (r) {
          var t = e[i][1][r];
          return o(t ? t : r);
        }, c, c.exports, r, e, t, n);
      }
      return t[i].exports;
    }
    var f = typeof require == "function" && require;
    for (var i = 0; i < n.length; i++) o(n[i]);
    return o;
  }({
    "/": [function (r, e, t) {
      t.byteLength = c;
      t.toByteArray = v;
      t.fromByteArray = s;
      var n = [];
      var o = [];
      var i = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
      for (var a = 0, u = i.length; a < u; ++a) {
        n[a] = i[a];
        o[i.charCodeAt(a)] = a;
      }
      o["-".charCodeAt(0)] = 62;
      o["_".charCodeAt(0)] = 63;

      function d(r) {
        var e = r.length;
        if (e % 4 > 0) {
          throw new Error("Invalid string. Length must be a multiple of 4");
        }
        return r[e - 2] === "=" ? 2 : r[e - 1] === "=" ? 1 : 0;
      }

      function c(r) {
        return r.length * 3 / 4 - d(r);
      }

      function v(r) {
        var e, t, n, i, a;
        var u = r.length;
        i = d(r);
        a = new Uint8Array(u * 3 / 4 - i);
        t = i > 0 ? u - 4 : u;
        var c = 0;
        for (e = 0; e < t; e += 4) {
          n = o[r.charCodeAt(e)] << 18 | o[r.charCodeAt(e + 1)] << 12 | o[r.charCodeAt(e + 2)] << 6 | o[r.charCodeAt(e + 3)];
          a[c++] = n >> 16 & 255;
          a[c++] = n >> 8 & 255;
          a[c++] = n & 255;
        }
        if (i === 2) {
          n = o[r.charCodeAt(e)] << 2 | o[r.charCodeAt(e + 1)] >> 4;
          a[c++] = n & 255;
        } else if (i === 1) {
          n = o[r.charCodeAt(e)] << 10 | o[r.charCodeAt(e + 1)] << 4 | o[r.charCodeAt(e + 2)] >> 2;
          a[c++] = n >> 8 & 255;
          a[c++] = n & 255;
        }
        return a;
      }

      function l(r) {
        return n[r >> 18 & 63] + n[r >> 12 & 63] + n[r >> 6 & 63] + n[r & 63];
      }

      function h(r, e, t) {
        var n;
        var o = [];
        for (var f = e; f < t; f += 3) {
          n = (r[f] << 16) + (r[f + 1] << 8) + r[f + 2];
          o.push(l(n));
        }
        return o.join("");
      }

      function s(r) {
        var e;
        var t = r.length;
        var o = t % 3;
        var f = "";
        var i = [];
        var a = 16383;
        for (var u = 0, d = t - o; u < d; u += a) {
          i.push(h(r, u, u + a > d ? d : u + a));
        }
        if (o === 1) {
          e = r[t - 1];
          f += n[e >> 2];
          f += n[e << 4 & 63];
          f += "==";
        } else if (o === 2) {
          e = (r[t - 2] << 8) + r[t - 1];
          f += n[e >> 10];
          f += n[e >> 4 & 63];
          f += n[e << 2 & 63];
          f += "=";
        }
        i.push(f);
        return i.join("");
      }
    }, {}]
  }, {}, [])("/");
})();


const encrypt = 1;
const decrypt = 0;
const round = 32;
const block = 16;

const sbox = [0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7, 0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05,
  0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3, 0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99,
  0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62,
  0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95, 0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6,
  0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba, 0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8,
  0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b, 0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35,
  0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87,
  0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52, 0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e,
  0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5, 0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1,
  0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55, 0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3,
  0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60, 0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f,
  0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f, 0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51,
  0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f, 0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8,
  0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd, 0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0,
  0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e, 0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84,
  0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20, 0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48
];

const ck = [
  0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269,
  0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9,
  0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249,
  0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9,
  0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229,
  0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299,
  0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209,
  0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279
];

const rotl = (x, y) => x << y | x >>> (32 - y);

const byteSub = (a) => {
  return (sbox[a >>> 24 & 0xFF] & 0xFF) << 24 | (sbox[a >>> 16 & 0xFF] & 0xFF) << 16 | (sbox[a >>> 8 & 0xFF] & 0xFF) << 8 | (sbox[a & 0xFF] & 0xFF);
};

const l1 = (b) => b ^ rotl(b, 2) ^ rotl(b, 10) ^ rotl(b, 18) ^ rotl(b, 24);

const l2 = (b) => b ^ rotl(b, 13) ^ rotl(b, 23);

const sms4Crypt = (input, output, rk) => {
  let r, mid;
  let x = new Array(4);
  let tmp = new Array(4);
  for (let i = 0; i < 4; i++) {
    tmp[0] = input[0 + 4 * i] & 0xff;
    tmp[1] = input[1 + 4 * i] & 0xff;
    tmp[2] = input[2 + 4 * i] & 0xff;
    tmp[3] = input[3 + 4 * i] & 0xff;
    x[i] = tmp[0] << 24 | tmp[1] << 16 | tmp[2] << 8 | tmp[3];
  }
  for (r = 0; r < 32; r += 4) {
    mid = x[1] ^ x[2] ^ x[3] ^ rk[r + 0];
    mid = byteSub(mid);
    x[0] = x[0] ^ l1(mid);

    mid = x[2] ^ x[3] ^ x[0] ^ rk[r + 1];
    mid = byteSub(mid);
    x[1] = x[1] ^ l1(mid);

    mid = x[3] ^ x[0] ^ x[1] ^ rk[r + 2];
    mid = byteSub(mid);
    x[2] = x[2] ^ l1(mid);

    mid = x[0] ^ x[1] ^ x[2] ^ rk[r + 3];
    mid = byteSub(mid);
    x[3] = x[3] ^ l1(mid);
  }

  for (let j = 0; j < 16; j += 4) {
    output[j] = (x[3 - j / 4] >>> 24 & 0xFF);
    output[j + 1] = (x[3 - j / 4] >>> 16 & 0xFF);
    output[j + 2] = (x[3 - j / 4] >>> 8 & 0xFF);
    output[j + 3] = (x[3 - j / 4] & 0xFF);
  }
};

const sms4KeyExt = function (key, rk, flag) {
  let r, mid;
  let x = new Array();
  let tmp = new Array(4);
  for (let i = 0; i < 4; i++) {
    tmp[0] = key[0 + 4 * i] & 0xFF;
    tmp[1] = key[1 + 4 * i] & 0xff;
    tmp[2] = key[2 + 4 * i] & 0xff;
    tmp[3] = key[3 + 4 * i] & 0xff;
    x[i] = tmp[0] << 24 | tmp[1] << 16 | tmp[2] << 8 | tmp[3];
  }
  x[0] ^= 0xa3b1bac6;
  x[1] ^= 0x56aa3350;
  x[2] ^= 0x677d9197;
  x[3] ^= 0xb27022dc;
  for (r = 0; r < 32; r += 4) {
    mid = x[1] ^ x[2] ^ x[3] ^ ck[r + 0];
    mid = byteSub(mid);
    rk[r + 0] = x[0] ^= l2(mid);

    mid = x[2] ^ x[3] ^ x[0] ^ ck[r + 1];
    mid = byteSub(mid);
    rk[r + 1] = x[1] ^= l2(mid);

    mid = x[3] ^ x[0] ^ x[1] ^ ck[r + 2];
    mid = byteSub(mid);
    rk[r + 2] = x[2] ^= l2(mid);

    mid = x[0] ^ x[1] ^ x[2] ^ ck[r + 3];
    mid = byteSub(mid);
    rk[r + 3] = x[3] ^= l2(mid);
  }

  if (flag === decrypt) {
    for (r = 0; r < 16; r++) {
      mid = rk[r];
      rk[r] = rk[31 - r];
      rk[31 - r] = mid;
    }
  }
};

const _gencode = (d, flag) => {
  let point = 0;
  let inLen = 16;
  let round_key = new Array(round);

  sms4KeyExt(d.key, round_key, flag);
  let input = new Array(16);
  let output = new Array(16);
  let out = [];
  while (inLen >= block) {
    input = d.source.slice(point, point + 16);
    sms4Crypt(input, output, round_key);
    out = out.concat(output);
    inLen -= block;
    point += block;
  }
  return out;
};

const stringToByte = (str) => {
  let bytes = new Array();
  let len, c;
  len = str.length;
  for (let i = 0; i < len; i++) {
    c = str.charCodeAt(i);
    if (c >= 0x010000 && c <= 0x10FFFF) {
      bytes.push(((c >> 18) & 0x07) | 0xF0);
      bytes.push(((c >> 12) & 0x3F) | 0x80);
      bytes.push(((c >> 6) & 0x3F) | 0x80);
      bytes.push((c & 0x3F) | 0x80);
    } else if (c >= 0x000800 && c <= 0x00FFFF) {
      bytes.push(((c >> 12) & 0x0F) | 0xE0);
      bytes.push(((c >> 6) & 0x3F) | 0x80);
      bytes.push((c & 0x3F) | 0x80);
    } else if (c >= 0x000080 && c <= 0x0007FF) {
      bytes.push(((c >> 6) & 0x1F) | 0xC0);
      bytes.push((c & 0x3F) | 0x80);
    } else {
      bytes.push(c & 0xFF);
    }
  }
  return bytes;
};

const byteToString = (arr) => {
  if (typeof arr === 'string') {
    return arr;
  }
  let str = '',
    _arr = arr;
  for (let i = 0; i < _arr.length; i++) {
    let one = _arr[i].toString(2),
      v = one.match(/^1+?(?=0)/);
    if (v && one.length == 8) {
      let bytesLength = v[0].length;
      let store = _arr[i].toString(2).slice(7 - bytesLength);
      for (let st = 1; st < bytesLength; st++) {
        store += _arr[st + i].toString(2).slice(2);
      }
      str += String.fromCharCode(parseInt(store, 2));
      i += bytesLength - 1;
    } else {
      str += String.fromCharCode(_arr[i]);
    }
  }
  return str;
};

const encode = (d) => {

  let input = stringToByte(d.input);
  let key = stringToByte(d.key);
  let c = [];
  for (let i = 0; i < input.length; i += 16) {
    c = c.concat(_gencode({
      source: input.slice(i, i + 16),
      key
    }, encrypt));
  }
  return base64js.fromByteArray(c);
};

var decode = function (d) {
  var input = base64js.toByteArray(d.input);
  var key = stringToByte(d.key);
  var c = [];
  for (var i = 0; i < input.length; i += 16) {
    c = c.concat(_gencode({
      source: input.slice(i, i + 16),
      key
    }, decrypt));
  }

  return byteToString(c).replace(/(\s*$)/g, "");
};

export default {
  encode,
  decode
};